Deep well pump



'P 24, 1949- v A. G. MILLER 2,21

DEEP WELL PUMP Filed Dec. 29, 1958 2 Sheets-Sheet 1 ALFRED MILLER ATTORNEY.

Sept. 24, 194%. A. e. MILLER DEEP WELL PUMP Filed Dec. 29, less 2 Sheets-Sheet 2 INVENTOR.

Z/ MILLER BY QMMZQ: ATTORNEY.

ALFRED Patented Sept. 24, 1940 DEEP WELL PUMP Alfred G. Miller, Galva, Kans., assignor of onehalf to Raymond Gillott, Wichita, Kans.

Application December 29, 1938, Serial No. 248,226

2 Claims.

My invention relates to a deep well pump, and has for its principal object a compression chamber as a shock absorber for the upward stroke of the pump, such as commonly employed in oil well The invention herein disclosed consists of a tube I, functioning as a conductor for oil as pumped from the Well. The said tube extends from the surface downward in contact with the pumping service. oil sand or pool of oil, the lower end of which is 5 A further object of my invention is toprovide, qu pp W t a yp p p equipment. at the bottom of the oil well, a compression Sistihg Of a y i having a Check ValVe 3, chamber that will yield at each stroke of the shown y dot lines, and plun er he pl pump to gradually hoist the column of oil extendbeing eq pp W t a o Which the p ing from the bottom of the well to its upper exr d 5 is nnected, s id rod ex ndin upw rd to 10 tremity or lace of discharge, the said chamber be n ed y a s ita l p mp l n f W i to assist for a continuous flow of the oil during s lustrat d as at t e ja being Operated b pulsative strokes of the pump. a surface rod, 1, as reciprocating means for the A still further object of my invention is to pro- P p- The method thus disclosed has reference vide a pneumatic system, unitarily arranged and 0 the ua ay y Which Oil i p p d from a 15 spaced along the oil conductor tube from the botdeep Well, in Which case the tube as a o u to tom thereof upward, as may be required for the o the Oil s of great length, and being filled With de th of the well, the units coacting under the the il in th r rs of p pin affords an i impact of the column load and stroke of the t se r s sta t t upp r s k f the pump. pump simultaneously. In other words, the weight imposed thereby must 20 A still further object of my invention is to promove instantly as h plunger StaItS upward, the vide a check valve means in the pump conductor result of which is a great Strain po t p p casing whereby the column load will be carried to rod and Operating means tl'lerefor- To Overcome release compression which would otherwise be this diiflciilty, I have p ded d p a ed 0 the imposed i th compression Chamber or chambers tube in close relation to the cylinder of the pump a th a may a compression chamber 8, consisting of a tubular A still fu th object, of my invention is to element greater in diameter than that of the tube, range a, compression chamber carried by the and extending therealong. The upper end of said pump rod above t discharge line f the oil to tubular element is secured air tight to the tube, fun ti as Cushion at the fir t impulse of the and likewise the lower end thereof, by which pum t avoid sudden pick up f the load means a compression chamber is formed, func- These and other objects will hereinafter be honing asashock absorbermore fully explained, reference being had to the Positio'hed in the tubeadiaceht the lower end accompanying drawings, f rmi a part of this of the said compression chamber is a plurality 5 specification, and in which like characters will of apertures as Commuhicahhg means between apply t lik parts, in the difi' t Views. said tube and the cavity of the compression Referring t t drawings; chamber, whereby the oil as pumped is free to Fig, 1 i an elevation f an n well pump equip flow through the apertures in its ascent to the ment, illustrating a propcsed position of surface. The oil thus introduced in said com- 40 pression Chambers, parts removed fo convem pression chamber is sealing means for the air ien ofi1]u tra,ti0n I contained therein, and by further injection, the Fig. 2 is an enlarged fragmentary sectional compressed according to the force i of th co npression chamber. posed therein, said force being actuated as a re- Fig. 3 is an elevation, showing an approximate of the of Oh ehtehchhg upward position of the compression Chambers on the through the tubing, and in conJunction with the plumpljne, stroke of the pump, whereby a cushion is pro- Fig. 4 is a modification showing a valve that is h for h stroke as the 0h is p associated with the compression chamber. h dead h at thehrst Impulse of the Fig. 5 is a sectional view taken on line 55 in phmphlg mehhahlsm' Fig. 4, looking in the direction of the arrows. 1 15 shown slhgle compresslhh cham' Fig 5 is a Similar modification to that shown her applied to the tube as above descrlbed. To in Fig. 4, the valve varying in its construction. avoid excess lehgth that may he required I have Fig 7 is a Sectional View taken on line in provided a series of such compression chambers Fig spacedalong the tube, each of which have a sim- F*j g 3 is an inustration Showing the compres ilar connection to the tube. Consequently, the

sion chamber carried by the pump rod adjacent the mule head of the pump jack. I

Fig. 9 is an enlarged sectional drawing of the valve as applied to the compression chamber illustrated in Fig. 8.

cushion effect is increased according to the depth of the well and the length of the pump stroke.

Being so arranged, a continuous flow of the oil discharge may occur, whereby pulsative movement islargely eliminated. In Figs. 4' and 5 is shown a modified way of supporting the column of oil in the tube that is maintained by the pump action as it flows continuously through a pipe line as conducting means to place of storage. The said means consists of a valve l0 seated in a pitting ll, functioning as a coupling for the tube, the valve to function as a check for the oil as forced therethrough, and the said valve has a plurality of wings l2, radially extending from a hub l3 that is axially bored, and through which the said pump rod will engage with a smooth running fit sufficient to render it practically oil tight, and the said wings are adapted to slideably engage on the wall of the fitting as it moves longitudinally therein, the extreme upward position of which is shown by dotted lines A, by which means the column of oil is maintained for a repeated stroke of the pump, the weight of the column not being imposed upon the compression chamber, the result of which may provide a greater elasticity of the compression chamber than it would otherwise, and a similar valve equipment may be applied in working relation to each succeeding chamber along the tube at the discretion of the manufacturer or oil field operator. A further modification with respect to the construction of the valve is illustrated in Fig. 6, in which case the fitting is equipped with an annular chamber B that is subdivided by a plurality of partitions I4, vertically positioned therein, and in which are ball valve equipments, as shown in Fig. '7, the said ball valves functioning as a check for the oil as forced therethrough.

To retain the said balls in their respective receptors of the fitting, there is provided an annular member M medially crossing each chamher, and being secured to the upper edge of the said partitions. Being so arranged, it will not encumber a freefiow of oil therefrom, but retain the balls in operative position. In Fig. 8 is shown the application of the compression chamber in connection with the pump rod, and being carried thereby in close proximity to the mule head of the pump jack, in which case a piston 15 is secured to the upper end of said rod, and free to move reciprocatingly in its respective compression chamber 8 as the load may impose, the said chamber being substantially air tight, and provided at its lower extremity with an intake valve l6, by which means, when the piston is moved upward as the result of a maximum downward stroke, the deficiency as a result of possible leakage is supplied. There is also arranged at the upper extremity of said compression chamber a breather tube l1, through which air will eject and inject as a result of reciprocating movement of the piston.

As an air tight means for the rod where it leaves the compression chamber, there is provided a stumng box consisting of a plug I8, threadedly engaging in the lower end of said chamber, and being axial therewith. The said plug is bored to receive the rod at its inner end, while the outer end is axially bored to receive a packing l9 that is compressed by a gland nut 20, threadedly engaging in the last said bore of the plug. There is also placed within said chamber a small quantity of heavy oil as lubricating and air tight sealing means for the rod in its reciprocating movement.

While I have shown and described compression chambers specifically, and also certain valve construction, I do not wish to be so restricted, as the same may be modified so long as their tunetion remains the same, and furthermore, while I have shown a series of compression chambers spaced along the rod, each of which has communicating apertures with the tube, and such apertures may be eliminated, xcept in the lower chamber, in which case the succeeding chambers may be connected by tubular studs or apertured heads of the chambers when said heads are connected air tight, and such other modification may be employed as lie within the scope of the appended claims.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a deep well pump, a tubular pump conductor having a cylinder at the lower end thereof, and a check valve operatively positioned in the cylinder, a pump rod and plunger within the tubular conductor, power means to reciprocate said rod and its plunger as elevating means for oil in said tubular conductor, a tubular element greater in diameter than the tubular conductor through which the latter axially extends, each end of said tubular element being closed air tight by a head, the heads axially bored to engage said tubular conductor air tight, whereby a compression chamber is formed near the lower end of said tubular conductor, and the said conductor being apertured to communicate with the compression chamber adjacent the lower end thereof, a coupler for the ends of the tubular conductor within the compression chamber and being in close proximity to the apertures, a check valve having a hollow stem and axially seated in the coupler so that the pump rod will slidably engage through the stem with substantially fluid tight running fit, wings integrally joined and radially extending from the valve stem. to slidably engage the wall of the coupler whereby the oil in the tubular conductor is carried upward from said valve while an added charge of oil is being raised by the plunger while the air insaid compression chamber will function as a cushion at the moment of impact.

2. In a deep well pump, a tubular pump conductor, a check valve and plunger cylinder secured to the lower extremity of the tubular pump conductor, a pump rod extending through the tubular pump conductor to near its lower extremity to where it joins the cylinder, the rod having a plunger secured to its lower end, and means to reciprocatingly move the rod longitudinally whereby oil is elevated through the tubular conductor, a compression chamber surrounding the said conductor and spaced a short distance from the lower end thereof, means to seal both ends of the compression chamber air tight, and at the points where the said conductor extends through the sealing means, the said conductor being apertured adjacent the lower end of said compression chamber and communicating with the interior of said compression chamber whereby oil will enter as elevated to form a cushion, pulsating with the plunger movement and gradually taking the load at the instant of impact, a check valve structure positioned in the tubular conductor adjacent the apertures as carrying means for oil in said conductor above said valve whereby compression is relievedin the compression chamber to insure flexibility in the compression chamber at each succeeding stroke of the plunger, all as and for the purpose specified.

. ALFRED G. MILLER. 

